Automatic combined gas and water cock for mechanisms for heating liquids.



. J. J. LISGH &. W. L. ROOT. AUTOMATIC COMBINED GAS AND WATER 000K FOB,MECHANISMS FOB HEATING LIQUIDS.

APPLIOATIOF FILED APR. 16. 1906. I Patented Sept 21. 1909.

2 BEBBTHEBBT UNITED STATES EXTENT OFFICE.

AUTOMATIC COMBINED GAS AND WATER COCK FOB MECHANISMS FOB HEATINGLIQUIDS.

Specification-of Letters Patent.

Patented Sen 21- 1 909.

Application filed April 16, 1906. Serial K0. 812,006.

To all whom it may concern: 7

lie it known that we, JACOB J. LISCH and \Vnauan L. Roo'r, citizens ofthe United States, and residents of the city of Cincinnati, in thecounty of Hamilton and State of Ohio, have invented certain new anduseful Improvements in Automatic Combined Gas and Water Cocks forMechanism for Heating Liquids, of which the following is aspecification.

The several features of our invention and the various advantagesresulting from their use conjointly or otherwise will be apparent fromthe following description and claims.

The main purpose of our invention is to obtain by an economicalconstruction and in an economical manner, with a dependable certainty,the supply of water to a water heater, and the heatingof this'water bygas for fuel. v

In the accom anying drawings, makin a part of this app ication and inwhich simfiar letters of reference indicate corresponding I parts,--Figure l is a top view of mechanism embodying our invention, incombination 'with one description of mechanism where with our improvedmechanism can be used. In this view, the cover or hood we usuallyprovide to protect the coils from dirt, and for other obvious purposes,is omitted. Fig. 2 is an elevation of that end of the construction shownin Fig. 1, which faces toward the right in Fig. 1. But this Fig. 2 showsthe frame uprights at the sides of the coils, and

a cover for the coils. Fig. 3 represents'a vertical, centrallongitudinal section of our improved automatic combined gas and watercock. The drawing of this figure is to a scale larger than that to whichFigs. 1 and 2 are drawn. Fig. 4 is a sectional view taken in the planeof the dotted line 4, 4, of Fig. 3,

that side of the section being taken which faces toward the right insaid Fig. 3. In this view (Fig. 1i the lower part of the piston head.together with the embracing cylinder and its inlet for water,- isremoved. the primary purpose of the view being to show the formation ofthe adjacent end of the check valve, and the relation of this valve tothe water way at the place in said way wherein it is located. Fig. 5 isa view of the piston valve. in elevation, and of its valve seat andsurrounding guard. in section. This view is on a larger-"scale than thatof Figs. 3 and 4. Fig. 6 is a view in vertical, central longitudinalsection of the parts illustrated in F ig. 3, only the upper half of theparts being shown. The purpose of this figure is to illustrate one ofthe purtions of the working parts, while the water is being drawn fromthe heater.

We will now proceed to describe our invention in detail; I

The water-heater itself may be of" any suitable construction. Inasmuchas it is desirable that the water in the beater should be heatedrapidly, the preferred construction is of a kind that will enable muchwater to be expeditiously heated. This is usually accomplished by aconstruction that provides a widely distributed or extensive heatingsurface, and a large amount of fire.

One of the preferred constructions for compactly obtaining a widelyextended heating surface consists of a coil or coils of pi pes compactlyarrauged to receive the heat, and a line or lines of flame, ora seriesof burners.

\Yhile our invention is applicable to various kindsof waterheaters andof burners.-

we ln "e shown herein and will describe one of the preferred kinds ofwater-heaters and higher plane and there is again bent and extends backand forth. its like construction is continued higher up in as man planess desired, seven of such layers of pipes. in as many planes, beingshown, in the drawing. F i 2. These coils of piping are suitably upheld.them is as shown by the two terminals of the pipe A. For example, theinlet end por-. tion A" of the pipe A serves to uphold the coils of theheater, and the exit end portion A of the pipe A performs a likefunction.

'e. provide a frame B, and to this frame we connect the inlet endportion A of tin coil and the 'exit end portion 3 thereof. The exit endportion A is exteiuledilu-ough a suitable connection to whatever placeit idesired to deliver the water. In the present A convenient mode ofupholding faucet or cock C.

- at suitable intervals.

in a straight portion A, back beneath the coils to theopposite end ofthe heater (such extension being shown by dotted lines in Fig. 1) and isat its end provided with the t is from this faucet, or cock C that the,hot water heated in the coils of the heater is delivered. v t

The frame ll suitably supported from below. Legs 13*, one of which isindicated in F g. at proper intervals, constitute a preferred means ofsupport. Uprights B extending from the frame B upwardly, not onlysupport the cover Z, but also serve to assistin keeping the coils A inplace. These coils A are for this reason connected to these uprights.The cover or hood Z is provided with one or more apertures Z for theescape of the hot air rising from the burners.

.The burners D consist of aseries of parallel pipes with opening I) inthe top thereof These burners D, D are distributed at proper intervalsunder the entire bottom' surface of the body-of the coils of pipe A.

The construction of this heater, as to coils and burners, is not new,and we make no claim for the same.

' Our newly invented mechanism is as follows:- l

E is a cylinder, properly closed by a rear cylinder head E and a frontcylinder head E One of these cylinder heads should be removable. Bothare preferably removable, and are removably connected to thecylinderfpreferably as follows: At each end the cylinder has an outerannular fian e Ei Each cylinder head is bolted to its adiacent endflange 15* of the cylinder by the securing screws or bolts 5", whichlatter pass into the adjacent flange E and by means of a female screwthread in the flange E", or by a nut. at; the opposite sideof theflange, make their necessary engagement to hold the head to the flange.In Figs. 3 and 6, female screw threads E are present in the said flangefor engaging the screws E". A suitable packing i is present between thecylinderhead and the adjacent flange E. Within this cylinder E is apiston Ij,'capable of sliding back and forth within the cylinder. Theperiphery of this cylinder fits closely the inner surface of thecylinder and preferably a packing F 2 of am suitable kind is present atthe periphery of the cylinder.

A tube G is connected at one end to the piston. The interior sp'ace orpassageway G of this tube G extends through the piston, and ispreferably concentric therewith, so that the axial center of the pistonis coincident with the axial center of the passage G This tube G extendsforward through the frontcylinder head and to distance beyond thelatter. The tube is from one point bf view a hollow piston rod. That.part of this piston rod which is next to the piston is necessarilyhollow. but. that part G of the .rod which is nearest the gas cylinderis not.

.E. An oil passage E" in this hearing permits a lubricating oil to beapplied to the piston G so thatthe latter shall never-work hard nor stopby reason of friction, but on the cont 'ary shall always move easily inits bearing, in the cylinder head E, E. The inlet It for itroducing thewater into the cylinder E is located near the midlength of the cylinder\Vithln the passageway G of the piston G is a valve K and its valve seatM. The valve K and its seat M" are so relatively constructed that thevalve cannot move unduly away from it. To this end, the 'alve seat hasat one end a beveled enlargement M and when the valve is moved forward,constitutes the valve seat proper. 'hen the enlargement K of the valve Kis against. the beveled portion M (that is the valve seatproper). thevalve is closed and vice versa. From this beveled valve K- extends avalve stem K. At the opposite end of the valve stem K is an extension K*preferably beveled and adap ed to lit a bevelcd annular part Mstationary in the passage G. The valve K, stem K and extension K thusformed in combination with the tationary valve seal: M and stationaryart M cannot leave the passage G But because of the length ofthe stem,this valve.-

stcni and extension are (or viewed as one is) free to move back andforth quite sutlicicntly to permitthe valve to leave its seatfar enoughto allow much water to pass through between the valve and its seat. 'henthe valve is not only nnseated, but the extension K is against thebeveled part M the passageway G 18 not entirely obstructed, but onaccount of the openings K In the extension K, the water can pass throughsaid openings K. and at each side ofthe valve stem K. and thence betweenthe valve and its seat, or vice. versa.

For ctmveniencc of manufacture, the bevcled valve seat M and the beveledpart M- are united, forming an annular ring M.

In the left hand part. of the cylinder E is an exit passage E for thewater, as hereinafter described. I

For the purpose of insuring entire safety to the coils, in case thewater is turned off while the heater is in operation, we provide intothe leather, and makes a tight joint.

the spring N. This spring will operate and move the valve from lefttoright '(see'Fig; 3) and close the gas vvalve and thereby stop the supplyof gas to the burners, and so putthem out, and thus prevent steamforming and causing an explosion in the coils.

In other words, the spring N is a safety spring in case'of troublearising from stoppage of the watervin the supply pipe, or otherwise. iIn the side of the tube or conduit G, is an exit passageway G. This wayG is located in said tube G at a place to theright of the piston, Figs.3 and 6.

The preferred description of gas valve, and the connections between thisgas valve and the water valve is as follows -P indicates the inletconduit for admitting gas to the heater coils A. P indicates the passagethrough the gas valve seat Q. 1 is the chamber in which the gas valve Qworks. When the valve is open. the passage P is connected to the inlet Pbythe chamber 1. The valve proper Q is preferably a leather one, andwhen brought against its valve seat Q-', prevents the gas entering theinlet P from passing through the passage P and into the chamber P. Thevalve seat is referably a raised annular edge, which atter when thevalve is against it, presses After the gas passes through the valvepassage P it passes out'of the .valve chamber P* through the exitopening or conduit P". To retain this-valve Q in place. and to enablethe material of which it is composed to be readily replaced, I connectthis valve tothe adjacent end of the plunger by a screw Q".

In the chamber P is an air tight plunger B. This lunger R works closelyin the chamber its peripheral surface making 'an air tight connectionwith the interior surface ot'the chamber P; To ettectuate very perfectlythis air-tight connection, an annular packing R is present in theperiphery of the plunger B. This close connectionbetween the plunger Rand the walls of the chamber I prevents the as which enters.

the chamber by the gas inlet P from escaping between the plunger and theadjaccntwall of chamber P S is an adjusting stem for regulating the flowof gas, the amount of the flow being accurately regulated by advancingor retracting the stem relatively to the tube piston G. This stem S hasa screw thread S which latter engages the female screw thread of the nutG of the piston tube G, G This nut G is preferably at firstseparate-from said tube or piston rod G, G and is then connectedthereto, but may be integral with this rod. By rotating this stem withinthe nut, the stem may be made toproject more or less from the pistonrod.

- ;truction to coiipcraic with this enlarged head is a sleeve or part Itwhich is at the rear part of the plunger R and is lixcd there. As thepassage through this sleeve ll is of less diameter than the head 3* ofthe stem. the latter. when drawn back. cannot slip out of the plunger.After the stem is fixed in the piston rod .so that the correct amount ofit (the stem) projects forward and into the plunger. to keep the stemfixedly thtre, a set not R" is screwed on this stem and against thestationary nut G. This prevents. in the well known manner. the stem fromturning. and consequently from moving longitudinally relatively to thepiston. hen the piston rod is tubular. the diaphragnr Gpreferablypresent. Before proceeding to describe the operation of thiscombination valve. a short description of the conduit connections ofthese valves is advisable.

F)" is the exit water conduit of the cylinder E. This condnit-llconnects with the coils of pipes A.- and thereby supplies these coilswith water. The exit gas conduit P of gas chamber l extends to the pipesl)",.

which in turn-supply the vertical gas pipes l), which latter deliverthegas at the burner openings D'-. An (-xit conduit V in the gas inletconduit 1 carries continually a small amount of gas to the pilot burnerY. The

latter is used for igniting lne principal :lllai, large burner l). l).l). A. stop cock Y in v the conduit V enables the amount of gas passingto the pilot burner to be regulated. and to be entirely shut oil. whenthe mechanism needs repair. or when it'is out of use for a long time.

The valve mechanisms are suitably supported. In the present illustrativeinstance, the'cylinder E is connected by an extension E to the frame B.The conduit E passes through'this extension. l

The chambers 1" and I are for convenience of manufacture, preferablyintegral as shown and constitute a single piecc which for convenience isdesignated by the character X. This-piece X is connected to. the

" frame B, by an extension X. The conduit P passes through thisextension X The mode in which our improved mechanisms operate is asfollows: Water is supplied through the inlet pipe H. There ispreferlot)ahty a means of regulating the flow of water 1 through the pipe ll.because in case the water heater mechanism is to be altogether stoppedor ren oved, the i'ater in the pipe 5 which feeds pipe 11 wouldcontinueto flow out at the point on the pipe where the inlet pipe II asrpmoved, thereby occasioning a ossof water, and a possibly injury toWhat the watzgr cfo nes in contact with. To this end a stop cock is tobe understood as gov.-

. ermng the adm ssion of water to pipe ll,

but as su lrcock forms no part of our inventiou it is'omltted from thedrawings. lfuder' ordinary use of our invention, the

15 above named cock will ,be always open and space Y of the cylinder l).and then passes through the opening atvalve K and runs into the space Yofcvlinder E. and. thence into the conduit E It passes through conduit Einto the coil of pipes and duly fills 2 them. During this operation, thegas is shut off from pipe P and from the burners.

As to the operation of the piston and valve K: the voter after itdiasfilled the space Y of the cylinder E, presses against.

0, the piston F and moves the piston to the left (Fig. 3) to theposition shown in Fig. 6. At'th'e same time, the valve K is pressed to,the left and is thus opened. The discharge cock C is now. closed,whereupon the piston F will return to the position shown by solid linesin Fig. 3, and the valve K will be moved to'the right and be closed. Thegas is now admitted to pipe P. by turning a suitable cock P and pass :5into pipe V, and the 40 cock being opened. the gas exits at the pilotburner \V. The latter is now lighted. The heater is now ready foroperation. \Vhenever a person desires to have hot water from the heater,he opens the discharge cook- The water flows out therefrom. At the sametime, the water from thesourcc of supply enters the pipe H and the spaceY of cylinder E. In answer tothis impulse. the piston F moves quickly tothe left all the way over until it occupies the positionshown by dottedlines F'"', F in space Y of the cylinder E. This long. movement of thepiston does through the agency of the piston rod and .thstem S draw backthe plunger 1t. .55 and the valve Q, thereby opening the passageway Pfand allowing gas to pass into the chamber P. .Thence the gasimmediately passes into pipe P and thence to the burners D". ,It.is'there lighted by the flame of the pilot "burner V. The flame of theI latter ignitesthc gas of the burner. nearest 1t.,and each burnerlgnites the ad acent one. Thus the various burners are practicallysimultaneously lighted, and all the burners piping qt. the coils is thinand the'diamete'r of the l'rlplll is small, the water is rapidlyheated.and lieco neshot, and 1S ready for delivery. and as it runs out of thedelivery faucet C, it is hot'and ready for use.

To return to'the piston F. After the piston F moves to the leftand'occupies the p01 sition shown by the dotted lines F F", -it (i005not remain there but moves'back to the right and occupies a midwayposition shown in Fig. (3. While the water continues to run, thepistonstands at this midposition. When in this position, the inlet, H isnot at all covered by the piston, but is entirelyopen, .thus allowing avery large passage of water through it. .0 also the outlet E 'is not atall covered by the piston, and allows a very large flow of water throughit. The

water passing into the space Y of the'cylinder then runs through theorifice G" of the hollow piston'G", thence through the openings K of theopen valve, thence through the passage around the valve K, thence intothe space Y of the cylinder thence outthrough conduit E and'ihenceintothe coils. There it is heated on its way to the delivery faucet C andissues therefrom at a temperature raised from seventy .to one hundredand forty degrees. \Vhen the outflow of water from the faucet is stoppedby turning the same, the back pressure of water in the space Y of thecylinder-I) will cause the piston F to move toward the right, andthrough the agency of the piston rod t}, stem 5. and oluuger ll closesthevalve Q, Q and ti the supply of gas to the main burners, leaving onlythe pilot burner \V ignited. As the piston has moved as far as it can tothe right, it occupies the position shown in- Fig. 3. i

.Another advantageous function of our invention is as follows: In casethe cock at C has been fully and then partly closed, or in case it ispartly opened, the water pressure; that is the differential pressure ofit partly closes the valve -K and moves the piston F hack to theposition shown in Fig. .6. but as such movement is not enough to closethe gas valve Q, consequently the operator-can secure a smaller (inthiscase his.

desired) amount of water-and as the gas is not turnedotl" the water isheld over the' gas flame. and the water issues at a correspondinglyhigher degree of temperature. In other words, if the water is turned onfull. the. action of the piston F and the valve K takes place thusopening in full the gas valve or openin P for e gas to pass to theburners. T1161! by'partly-closing cock C, it does not stop the flow ofthe gas to the burners D but it retards the flow of water so that itflows slower through the coils. The water thus absorbs more heat as itis held longer over the flames of the burning as. V n n ()ur inventionallows a pull and push movement without. springs, etc., and allows aplay 0?. the plunger 111 chamber 1.

By the water pressure on the piston l and valve K. we have a reliablemovement and power to auton'iaticall turn on and oil the gas to theburners simultaneously with the f flow of the water. the gas wheneverturned 1 on, being lighted h v the pilot light Y, which latter alwaysburning.

The term water wherever used in the foregoing specification and in theclaims, is to be understood to stand for and to include any kind ofliquid that can be used in our tion and desire to secure by LettersPatent,

1. An automatic gas and water cock for water heaters, comprising acylinder having a water inletand outlet therein, a piston in saidcylinder located between said outlet and inlet, a hollow stem connectedto said piston and having an opening therein communicating with theinlet side of the cylinder, said piston having an opening thereincommunicating with the hollow stem, a valve for preventing the back flowof the water through said opening, a second cylinder having an inlet andoutlet therein for gas, a valve controlling the outlettherein, a plungercarrying said. valve and a con waterh eaters. comprising a cylinderhaving a water inlet and outlet therein, a piston having a centralopening and located hetween said inlet and outlet, a hollow stem having;it end fitted in said opening. and an annular ring in the end of saidhollow stern forming a valveseat, a spool shaped valve having its bod)part located in said ring and having one of its heads adapted to engagethe valve seat to prevent hack liuV. of the water, and having an openingin its other head, such stem having an opening therein communicatingwith the inlet side of the cylinder, and a valve connected to the saidstem.

3. A combination gas and water cock for water heaters comprising acylinder having an inlet and outlet therein, a piston moving in saidcylinder, a stem on the piston. a see- 1 0nd cylinder having a gas inletand outlettherein, a valve controlling the gas outlet. :1 plunger in thecylinder carrying the said valve, said plunger having a chamber there-'in. a screw.adjustahlv connected to the stem of the piston and having anenlarged head iving in said chamber and having limited movement therein.and a detent at the end of the chamber adapted to be engaged by theenlarged head of the screw whereby the plunger will he moved.

JACOB J. LISCH. \VILBER L, ROOT.

